i think were you are right now(skill level) and the condition the terrain is you are just fine.you mentioned "nearly fell a dozen times" but the good thing is you did not.for what you and us have seen on the video some of the boarders passing by were not really carving just going faster on a more straighter line, so what! your learning how to carve and your not comfortable yet on speed so your ok. ice is not really our friend unless you got some type of magnetraction on your edges,if i would run on to some ice patches i just squat down lower and not do any quick turns.i slowly go to my heel edge if i can and slow down.honestly your scarving that day was "recipe of the day". though you where frustrated,we also get those days that its just not working out.come back next time and try again.one thing though,do not be too hard on yourself,enjoy your time out there.